My guess is the whole thing works as a system and you need a good keyway and key along with the right torque on the nut to hold it all together. I don't see need for alignment since drum orientation is not important I have used a light film of grease (applied and then wiped clean) for many years with no ill effects and drums always come off with a medium amount of effort. That has been on 122, p1800, and 544.